Reducing-gear.



PATENTED OCT. 13, 1908.

H, H; YOUNG. REDUCING GEAR. APPLIUATIORIILED 11110.31, 1902 NO MODEL.

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UNITED STATES Patented October 13, 1903.

HARRY HOWLETT YOUNG, OF COLCHESTER, ENGLAND.

REDUCING-GEAR.

SPECIFICATION forming part of Letters Patent No. 741,089, dated October13, 1903.

Application filed December 31, 1902. Serial No- I'B'LSZO. (No model.)

f 111 Improvements in Reducing-Gear,of which the following is aspecification.

This invention relates to improvements in red ucing-gear fortransmitting rotary motion,

and has for its object to provide a gear of higher efficiency than thoseheretofore in use which is suitable for motors of small energy and whichcan be easily adj ustedto com pensate for wear.

According to the invention I construct my improved gear of a disk,wheel, or the like, within which is located the motor the motion ofwhich is to be transmitted at a reduced speed to the disk or wheel. Theaxis of the shaft of the said motor is parallel to the plane of the faceof thedisk and its motion is communicated to the disk, or wheel by meansof a one-turn snail uponits end, which engages teeth, serrations, or theequivalent upon the inner face of a peripheral flange of the wheel ordisk.

In the accompanying drawings, Figure 1 is a side elevation of asuitableforrn of gear constructed according to the invention, and Fig. 2is a sectional end elevation thereof.

dis the disk or wheel, and b b are studs forming the teeth around theinner face of its peripheral flange. It will be understood that I do notlimit myself to the use of teeth formed in this way, although I havefound such teeth to give good results in practice.

0 is the motor, the power of which is to be transmitted. I have hereshown an electrometor; but any other suitable type of motor can beemployed where desired. dis the-shaft of the said motor, the said shaftbeing,as is clearly shown, arranged with its axis parallel to the planeof the face of the wheel a. It will be understood that the shaft 61 ofthe motor is secured to and rotates with the armature of adjustableaxially on the shaft 61 to enable wear of the working face to becompensated for. out and fitted upon one end of the shaft d, being heldadjustably thereon by a set-screw which does not appear in the sectionaldrawings.

The frame or bed-platef of the motor 0 is bolted to the support 9,and'the disk or wheel a is secured to a plate 72- on the motor by meansof the bolt- 11, which forms the pivot around which the wheel a turns.Ball-bearings j and is, respectively, are provided between the disk a,and plate 7L and the disk and nut Z upon the bolt 71. I may, if desired,mount a second and similar snail 6 upon the other end of the shaft at,set at half a turn in advance of the first snail. The employment of thissecond snail has for its object to obtain a more even and balancedtransmission than is given by the use of one snail only.

It will be apparent from an examination of the drawings that as theshaft d of the motor is rotated the spiral grooves of the worms orsnails will engage the teeth or projections on the interior of the rimof the wheel successively and cause the latter to revolve at a muchlower speed than that of the shaft itself.

Having now particularly described and ascertained the nature of my saidinvention and in what manner the same is to be performed, I declare thatwhat I claim is- 1. The combination with a wheel having the interiorface of its rim provided with teeth, of a motor located within thecircumference of the wheel, and provided with a driving-shaft arrangedparallel with the lateral faces of said wheel, and a snail on said shaftengagin g the teeth of said wheel, substantially as described.

2. The combination with a motor, of a flanged wheel mounted on the frameof the motor and having teeth on the interior face of its flange, saidmotor having a driving-shaft arranged parallel to the lateral'faces ofsaid.

wheel, and a one-turn snail on each end of said shaft engaging the teethof said wheel, one of said snails being set on the shaft in advance ofthe other, substantially as described.

HARRY nowiLirTT rouse.

Witnesses C. G. REDFERN, A; ALBUTT.

In the present case the worm is bored

